[Qemu-devel] [PATCH 1/3] virtio-ccw: add support for 9pfs

[Christian Borntraeger <borntraeger@de.ibm.com>]

From: Pierre Morel <pmorel@linux.vnet.ibm.com>

This patch adds 9pfs support for virtio-ccw
by registering the virtio_ccw_9p_info type
and adding associated callbacks.

Signed-off-by: Pierre Morel <pmorel@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
---
 hw/s390x/virtio-ccw.c | 56 ++++++++++++++++++++++++++++++++++++++++++++++++++-
 hw/s390x/virtio-ccw.h | 18 ++++++++++++++++-
 2 files changed, 72 insertions(+), 2 deletions(-)

diff --git a/hw/s390x/virtio-ccw.c b/hw/s390x/virtio-ccw.c
index ef90fed..ab629fe 100644
--- a/hw/s390x/virtio-ccw.c
+++ b/hw/s390x/virtio-ccw.c
@@ -1,8 +1,9 @@
 /*
  * virtio ccw target implementation
  *
- * Copyright 2012,2014 IBM Corp.
+ * Copyright 2012,2015 IBM Corp.
  * Author(s): Cornelia Huck <cornelia.huck@de.ibm.com>
+ *            Pierre Morel <pmorel@linux.vnet.ibm.com>
  *
  * This work is licensed under the terms of the GNU GPL, version 2 or (at
  * your option) any later version. See the COPYING file in the top-level
@@ -1730,6 +1731,56 @@ static const TypeInfo virtio_ccw_bus_info = {
     .class_init = virtio_ccw_bus_class_init,
 };
 
+#ifdef CONFIG_VIRTFS
+static Property virtio_ccw_9p_properties[] = {
+    DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id),
+    DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags,
+            VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true),
+    DEFINE_PROP_END_OF_LIST(),
+};
+
+static void virtio_ccw_9p_realize(VirtioCcwDevice *ccw_dev, Error **errp)
+{
+    V9fsCCWState *dev = VIRTIO_9P_CCW(ccw_dev);
+    DeviceState *vdev = DEVICE(&dev->vdev);
+    Error *err = NULL;
+
+    qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus));
+    object_property_set_bool(OBJECT(vdev), true, "realized", &err);
+    if (err) {
+        error_propagate(errp, err);
+    }
+}
+
+static void virtio_ccw_9p_class_init(ObjectClass *klass, void *data)
+{
+    DeviceClass *dc = DEVICE_CLASS(klass);
+    VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass);
+
+    k->exit = virtio_ccw_exit;
+    k->realize = virtio_ccw_9p_realize;
+    dc->reset = virtio_ccw_reset;
+    dc->props = virtio_ccw_9p_properties;
+    set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
+}
+
+static void virtio_ccw_9p_instance_init(Object *obj)
+{
+    V9fsCCWState *dev = VIRTIO_9P_CCW(obj);
+
+    virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
+                                TYPE_VIRTIO_9P);
+}
+
+static const TypeInfo virtio_ccw_9p_info = {
+    .name          = TYPE_VIRTIO_9P_CCW,
+    .parent        = TYPE_VIRTIO_CCW_DEVICE,
+    .instance_size = sizeof(V9fsCCWState),
+    .instance_init = virtio_ccw_9p_instance_init,
+    .class_init    = virtio_ccw_9p_class_init,
+};
+#endif
+
 static void virtio_ccw_register(void)
 {
     type_register_static(&virtio_ccw_bus_info);
@@ -1745,6 +1796,9 @@ static void virtio_ccw_register(void)
 #endif
     type_register_static(&virtio_ccw_rng);
     type_register_static(&virtual_css_bridge_info);
+#ifdef CONFIG_VIRTFS
+    type_register_static(&virtio_ccw_9p_info);
+#endif
 }
 
 type_init(virtio_ccw_register)
diff --git a/hw/s390x/virtio-ccw.h b/hw/s390x/virtio-ccw.h
index ad3af76..d729263 100644
--- a/hw/s390x/virtio-ccw.h
+++ b/hw/s390x/virtio-ccw.h
@@ -1,8 +1,9 @@
 /*
  * virtio ccw target definitions
  *
- * Copyright 2012 IBM Corp.
+ * Copyright 2012,2015 IBM Corp.
  * Author(s): Cornelia Huck <cornelia.huck@de.ibm.com>
+ *            Pierre Morel <pmorel@linux.vnet.ibm.com>
  *
  * This work is licensed under the terms of the GNU GPL, version 2 or (at
  * your option) any later version. See the COPYING file in the top-level
@@ -189,4 +190,19 @@ typedef struct VirtIORNGCcw {
 VirtualCssBus *virtual_css_bus_init(void);
 void virtio_ccw_device_update_status(SubchDev *sch);
 VirtIODevice *virtio_ccw_get_vdev(SubchDev *sch);
+
+#ifdef CONFIG_VIRTFS
+#include "hw/9pfs/virtio-9p.h"
+
+#define TYPE_VIRTIO_9P_CCW "virtio-9p-ccw"
+#define VIRTIO_9P_CCW(obj) \
+    OBJECT_CHECK(V9fsCCWState, (obj), TYPE_VIRTIO_9P_CCW)
+
+typedef struct V9fsCCWState {
+    VirtioCcwDevice parent_obj;
+    V9fsState vdev;
+} V9fsCCWState;
+
+#endif /* CONFIG_VIRTFS */
+
 #endif
-- 
2.3.0